Recoil apparatus for ordnance



A. BREMBERG AND A. BANKS.

RECOIL APPARATUS FOR ORDNANCE.

APPLICATION FILED JUNE 17, I920.

Patented July 19, 1921.

[NI/ENTORS HXEL BRE/WBERG- HLEXHn/DER BH/YKS fiw/vx H TT'ORIVES/S ill? units SHE,

Axnn YIBREMBEIRGT Asp ALEXA' vnER REG0ILA'IPARATUSE0R OBDNANbE-c mea er.

' Specification of Letters Patent.

- Patented July 19 19211.

ApplicationfiledJ'une 17, 1920': Serial No. 389,737;-

(GRANTED innmn rnnrnovrsions or-rnn'acror Manon s, mange-iii -I.., 13113;) v

To all whom it may concern:

Be it known that we, AXEL ,BREMBERG and ALEXANDER BANKS, of Parkhead Forge RollingMills and Steel Works,.in the city and county of Glasgow, v ."Scotland, engineers, have invented certain new and useful Improvements in Connectionwith Recoil Apparatus for Ordnance, of which the following is the specification.

The invention relates to thattype of recoil apparatus for ordnance in whichv there is a hydraulic buffer and an air recuperator; that is to say, in which the force of. recoil is-applied to a hydraulic piston operating in a cylinder from which cylinder liquid.

is thereby moved to one side of a floating piston in a secondcylinder, the other-aside of-which compresses air in that cylinder and in'a supplementary cylinder or vessel (any or all of which partsmay be in duplicate or more) while expansion of the} air. so compressed returns the gun to firing position.

The invention has primarily for itsobj'ect to provide in such apparatus improved and simple means for'adjustablycontrolling the speedof flow of liquid from-the first. to the second cylinder and so .forcontrolling the resistance against-recoil; The-invention has further for its object to providesimple means for recharging the apparatus with liquid and for indicating the. conditions within the .apparatus.. Further, there' is combined with the means for closing the aperture by which the-apparatusis charged means for indicating to the operator when it is safe-to use the gunit being. unsafeto do so when there-is aninsufiiciency of liquid (that insufficiency being indicatedby a fall of pressure in the liquid) or when the air pressure falls. 7 V According tothe inventlonthe oint means for adjustably controlling the speedofflow from the first to the second recoil cylinder and for recharging the apparatus with" liquid and indicating the conditions within it com prisea plug closing" the end of the second cylinder and having within it a chamber always communicating with the first cylinder, a valvecontrolling communication'be.

tween that chamber and the second cylinder and carried on a spindle extending outward through a stufling box and of such length that it may be moved inward'so as to arrest the usual floating piston in the second cylinderand end: elevation of a filling orifice G by a plug G n rmall closed aperture for lfilling purposes communicating I with QQl terior of the second cylinder. v d

7 An example of the carrying outof thej invention is, illustrated in an. accompanying sheetof explanatory drawings, Figure 1 51516- 111g a longiti'idinal section of that partof the recoil gear to which tl1e:invention-.-relates, andEig. 2 an enlarged sectional-elevation of. a'detail, while -Figsfii andr lgare respectively a sectional side elevation'land-an the. improved-indicating device. v. c In carrying out the inventio end of the second cylinder Aft/hat? in which the. floating piston, B ,operates is fclosediby a. plug. C. Aroundthisplug is a groove, forming between: the plug and the wallio-f the. cylinder. an annular chamber 1C This annularv chamber communicates firstly with a passage C from the space before the lad vancing-piston in the first andhydraulic cylmder (not shown). Secondly the annu;

glar chamber C communicates by way of l'a series of portsD with a valveseat D1 formed: upon the. mner face'of theplug. .Withgthis valve seat D there coacts a valve'E ofconi the rear g cal mushroomiorm carriedon a spindleE passinglout rearwardly through the plug fl and ofsuch a length; that for, a :pur.po;s'e hereinafter explained its inner end may be causedv to project a considerable .distance within the cylinder. The spindle'isscrewed C after, the usual manner of a. screw.,-'dow'n yalve, andis provided atits outer extremity with aremovable handle EF. "By operation ofthis handle the effectivearea ofthe' ports D connecting the annular chamber G "with the valve seat D may j be varied,thus, arying the area .of communication between" the first and secondi'cylinders' offthe apparatus and thus varying; theresistance. against.=re:-

coil. As more'clearly seen. iii-Fig. 2, .there is provided a stepped part E fionthevalve 'whichjust comes into contact with 'thejvalyej' seat D and'thus preyents completepl'osi'ire and engages a counterpart thread inthe, plug of the ports D communicating with the an f 'nular chamber 0 y w A portG connects the annular chamber 7 and passage G with. (Fig: 3) normally closed In order to make up for leak- (by wayiof the portG age of liquid from or Within the cylinder,

of-proper working conditions,

der E on it'with plug replaced, the valve spindleE away'from the floating piston and the valve E brought to its operative position.

As it is only safe to-fire the gun when a sufliclent pressure ex sts in the a1r reservoir, and'as this air pressure sets up an identical pressure in the liquid until the leakage has passed a certain safe limit, a pressure gage or indicator is provided in the filling plug G? itself; This plug indicator which is so placed that'it is under the operators-eye and shows at a glance whether theguncan be fired or not,-consistsof a pressure gage of that well-known form comprising a tubel-I closed at one end, ope-net the other and curved in annular form. The closed free end of this tube H is as usual connected by multiplying gearing H with a pointer H visible through a glazed aperture H in the top of the ping G and reading upon anindex mark The aperture H is of but small angular width, and there may be arranged behind the pointer a backing of luminous material, or alternatively the pointer may be coated with luminous material. r V

Since'at the moment of recoilthe pressure gage is subjected to very intense pressure, it

is necessary that its tube should be protected from undue distortion or fracture due thereto. For this reason, the gage tube'is' encircled by a seating G in the plug'of such dimensions that when the tube has'expanded to pressure slightly above that indicative its outer periphery comes to rest againsttheseating, and further and possibly damaging distortion is prevented thereby.

1 A recoil apparatus for. ordnance, comprising a cylinder, a floating piston therein subjected on one face to air pressure and on its other face to a pressure liquid, a plug closing the liquid entry end of the cylinder, but affording a chamber After the requiredv closing the liquid entry end but having an annular recess chamber surroundwith said chamber,

cylinder,

' prising a cylinder, a

V preventing complete subjected on one face to air pressure,

names to this specification) communicating J with the liquid inlet port, passage means be tween, said chamber and the cylinder, a valve controlling said passage, means for displacing said valve into engagement with the floating piston to support the latter against the air pressure thereon, and a normally closed liquid fill port communicating with the cylinden:

2. recoil apparatus for ordnance, comprising a cylinder, a floating piston therein subjected on oneface to air pressure, and on its other face topressure liquid, a plug of the cylinder,

forming with the cylinder an annular ing the :plug, an inlet-port communicating a passage establishing communication between said chamber and means for displacing said'valve into engagementwith the floating piston to support the latter against the air pressure thereon,

and a normally closed liquid 'fill port communicating with. .the cylinder.

' 3. A recoil apparatus for ordnance,'com- I float ng pistontherein sub ected on one face to air pressure, and

on its other face to'pressure liquid, a; plug closing the liquidinlet end of the cylinder, but affording a chamber communicating with the liquid inlet port, passage means between the said chamber and the cylinder, a valve controlling said passagef'meansfor closure of said passage by said valve, means for displacing said valve into engagement with thefioating piston to support the latter against the air pressurather'eon, and a normally] closed liquid fill port communicating with the cylinder. I V

at. A recoil apparatus for ordnance, coma floating piston therein and on its other face to a pressure liquid, a plug closing the pressure liquid end of the cylinder, but affording a passageway through which said. pressure liquid may pass, a-valve controlling said passageway, ,and a valve stem passing through said plug and disprising a cylinder,

placeable into engagement with the floating the latter against the air piston to support pressure thereon' V In testimony whereof we have signed our AXEL 'BREMBERG. ALEXANDER BANKS.

a valve controlling said passage, I 

